Direct quantification of gold along a single Si nanowire.
The presence of gold on the sidewall of a tapered, single silicon nanowire is directly quantified from core-level nanospectra using energy-filtered photoelectron emission microscopy. The uniform island-type partial coverage of gold determined as 0.42+/-0.06 (approximately 1.8 ML) is in quantitative agreement with the diameter reduction of the gold catalyst observed by scanning electron microscopy and is confirmed by a splitting of the photothresholds collected from the sidewall, from which characteristic local work functions are extracted using a model of the full secondary electron distributions.
Bailly
A
A
CEA-LETI, MINATEC, 17 rue des Martyrs, 38054 Grenoble Cedex 9, France.
Renault
O
O
Barrett
N
N
Zagonel
L F
LF
Gentile
P
P
Pauc
N
N
Dhalluin
F
F
Baron
T
T
Chabli
A
A
Cezar
J C
JC
Brookes
N B
NB